42706409 has 8 divisors (see below), whose sum is σ = 43884288. Its totient is φ = 41539840.

The previous prime is 42706381. The next prime is 42706421. The reversal of 42706409 is 90460724.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42706409 - 2¹² = 42702313 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42706109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5129 + ... + 10569.

It is an arithmetic number, because the mean of its divisors is an integer number (5485536).

Almost surely, 2^42706409 is an apocalyptic number.

It is an amenable number.

42706409 is a deficient number, since it is larger than the sum of its proper divisors (1177879).

42706409 is a wasteful number, since it uses less digits than its factorization.

42706409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5655.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 42706409 is about 6535.0140780262. The cubic root of 42706409 is about 349.5406463697.

The spelling of 42706409 in words is "forty-two million, seven hundred six thousand, four hundred nine".